Printing press cylinder mechanism



Oct. 27, 1938. J, IROUSEK 2,858,888

PRINTING PRESS CYLINDER MECHANISM Filed June 10, 1935 INVENTOR.

c7o0e,o% Jirozzwel ATTORNEYJ:

Patented Oct. 27, 1936 {,fUNiTED sures PATENT OFF-TCE. A

7 2,058,888 I p PRINTING PRESS CYLINDER MECHANISM- Joseph Jircuse'k,Cleveland, Ohio, assignor to I The Chandler & Price Company, Cleveland,Ohio, a corporation of Ohio V v H V I ".gfp iiea ion ime 1b, 19 5;"ss1'1vo. 25,7511} m 11 Claims. (01; 101-409) L'Ihis invention relates toprinting presses" and more particularly cylinder mechanism; and. it, isaimong the objects of the invention to'provide construction for accurateholding andreleasingof sheets of paper for'printing and the like. VO'ther objects and advantages willappear as the descrip tionproceeds. t.1 lfiE Qzth accomplishment of the-foregoing and related ends, the"invention, then, comprises the fea- 1'0; tures hereinafteriuliydescribed, and particularly pointed out ins-the claims, the,following descriptionand theennexed; drawing setting. forthjin de tail,an illustrative embodiment of the invention; this being;indicative,,however ot but one of the T5 en ious weysinfwhich theprinciple, of. the; inven iq -m rebeem lw d v 1 annegeddrewing z w i l kism-plan view of,a cylinder'imaccordance with the invention; Fig. 2 I isan end elevaltion of Q the -sarne Fig "-3 153 enlargedjragmentary sec:joni taken plane substantially" indicatedflby lin II; ig 1 ;;Eig u4; 15,similar ,viewi with the der-rotated'e' furthenhalf 'turnj andFi'gb 5 isa considerably enlarged sectional detail taken as on L the ane u st n ial n c tedb i e V,

Fig-4 w; Q

M. v we a ti ul r-1 y kt e dr wi e there s, 1 ln evp e ne lhel which maybe of usual steel-orironkonstimdtion,

30 the;cylinder shell bei-ng carriedrby at, sha-it- 3,, w th-1 14 me itini h fram 'i nt n pressga s need not -be .,here detajiled... Theshell 2longitudinally out outta receive gripper necha: nisrn, this; includinggrippers. ;5 which arelcarried 35, by a, rock shaft 6, whichiinturn.ismountedinthe ends, of, -the .cy1 inder .Qne end of the 4rock-,sheit isfl p vided with atgears pin-ionilcwhichmeshes with a;gearesegment iltpivotallymounted at, Slon the end wall vtof, thecylinder. ,The I gear-segment w Q i i4 -t i ww e i e a m-ll the,ledttenheingi, pivo tal lysmo unted at t. l 2 pnHthe ey1inder,end,;,such as to be [cperatedby afstetionary cam I3 in con unctonwith'afroller. Hi which s carried bv thefarm Anuegtension' arm is :51arranged; ceive u the thrust one returnr. A eat n m m t hu der ext erl'ei de b oiefi 5 i th icv d '13 spring. it conveniently 'mey sur-'hichfmay heve a slide mounting 5Q" in Q p h emme cani ltis thusiseen tooccas' tithe rocking o fthe arm ii 'onie'ach revolu hepcylinder,withacorrespondingoscilla tionof the fg'ear-sgmenthtl and a, rocking ofthe gr p r she-ft ,6 Thearrengement oi, the cam} l3 is; such. the tirth'es grippen-shaft is iocked into open or receiving positionintheupper and rear portion of its circuitof revolution-end as villustrated;iniEig. 4,; such open position involves angu l ar; relation of the heal;2B- of the gripper with relation to the underlying.v or anvil-portion ofthe cylinder shell 2| v The lattercarriessheet-releasing or clearingmeans, whereby; accidental stick ing oi the printed} sheet to thecylinder is obviated on the raising of.'the;gripper. i

As isshown nore particularly 5, such sheet reieasing means: comprisesafpl'unger, which is desirably in the form of v a baill 22' urged intooutward position by a, spring,.23,,the latter and the ball 22heinginzarecess or bore 211 in the cylinder shell. ii slightfover-hangiioi themetail wall: at 15 the outer end of the pore24 .,serves to preventcomplete escape of the ball 2'2 .v is thus ape parent, theball 22orreleaser;isfinsuch position as to be pressed inwardly by thegripperbeak when the latter se zestheshe Of pa e -ndrd 20 ing theportion of the revolutionof; the cylinder, while the paper is gripped.the releaser-balli? is forced into itsrece ss Z- l bythe pressureof thegripper, but immedietelion the raising movement of the gripper; thereleaser-bell. 22 ispr o 25 ette brine S in 2 s i ush the he freen'o'madhesipn :tofthe cylinder and thus allow of itsbeing "cleared. therefromLvvi-thout almishlp. Adjacentthe 'gripper'is a, gauge fo'n'tlhe frontedge ';0f the sheet. may'take t j rmjnfa 0 frqmgeqge gauge 2 6 Tof'segmental. or projection sha nd'theer fi Lenau niaylboth e venientlybe,inqu tea on the] rock shaft 6 by set screw neans 21. The, number, of grippersmay vary}. in eccordancefvviththe particular: require nents f-inany case, but, in! general will he isufb t o ede ua rip th h ewhr gh itswidth. TBy a corresponding. placement or; a f om ed e auge 65 t achgripp r ad r td en-a i i fre i ler or geu i the 40 position off-the,edge ofjth'e sheet is Assured; The series. eats? el m ts 26? 151 13injsu reletionito the gri per that haeve nntj i c mp-ion; is; had, and"when" the gripper-peaks 2B" are in open POSitiPiF i u t at 1.1m Fi 4= ef fi 5 5. are in "position to, receive} the front edge of the sheet;thereejgeinjst as the sheetiisforwarded into such positionbyineialnswhich neednot here be detailed; Q I @lk Q l j w tnflt e further,evel-M Qf e c e the'rock. shaft "6 carryingthejgfrippersend thegaugeelements i's'poscilletedsuch as w set the gripper-peaks 213f downupon the paper sheet and the. ui iderlying releaserl ball 22, end suchnew position is meinteinedlthrou'gh theffur ther turning of the cylinderto its opening position, where the rock shaft 6 is re-oscillated intogripper-open position.

For preventing the over-run of the sheets as fed to gripping position, afurther safeguard is had in the stop 30, which is arranged adjacent thecylinder and preferably at its lower side. Such stop may comprise aseries of fingers carried by a rock shaft 3!, which is oscillated toperiodically raise and lower the stop-fingers 30 in timed relation withthe revolution of the cylinder, whereby the stop is in operatingposition at the time that the front edge of the sheet is being broughtagainst the cylinder gauges 26 and into the open grippers. Foroscillating or rocking the shaft 3| and the stop 30, a rocker arm 32 isprovided on the shaft 3|, and through the intermediary of a roller 33 isperiodically actuated by a cam 34 at the end of the cylinder. To allowclose proximity of the stop 30, the cylinder wall is provided withgrooves or recesses of sufficient length to at least allow the stops 30to be raised into position beyond or within the contour-limit of thecylinder for the short period during which the sheet is being charged tothe grippers. Advantageously, such grooves 38 may be provided in thecover plate 39 proportioned to fit into and cover the opening left bythe cut-out section in the cylinder wall. The placement of the grippershaft 6 and associated mechanism off center in the cylinder tends todestroy accuracy of balance, and in very high speed operation anobjectionable vibration would develop. This tendency is obviated byplacement of suitable counterweight means 40. This may take the form ofsegments secured to the shaft 3 of properly adjusted weight. The coverplate 39 may then be held in place by screws 42. Desirably, the coverplate may be of light metal, in contrast to the heavy ferrous metal ofthe shell 2, for instance, aluminum, aluminum alloys, etc.

The manner of operation of the mechanism will be clear from theforegoing. Sheets of paper to be printed are fed in rapid succession bythe feeding means, not shown, and as the front edge of each sheetadvances to cylinder-gripping position, the sheet-stop 30 is in itsraised or operating position, as indicated in Fig. 4, the timing beingsuch that the front edge of the sheet is pushed by the feed mechanismagainst the stop 30 and against the gauge-members 26 which are then insuch position. Correspondingly the gripper-beaks 20 are open. With theadvance edge of the paper sheet thus pushed into position against thestop 30 and gauging elements 26, further turning of the cylinder takesthe cam roller [4 and the cam roller 33 into their respective positionsto rock the gripper-shaft 6 to close the grippers and rock thestop-shaft 3| to drop the stop 39 out of the path of the sheet, so thatit may thence be carried around by the cylinder. At the same time thatthe gripper-beaks 20 seize the sheet, the gauges 26 are in their advanceor gauging position and accuracy of placement is attained. With theclosing of the gripper-beaks 2B, the sheet of paper is of course clampeddown upon the cylinder shell and the releaser-balls 22, there being anumber of these corresponding to the number of the grippers or at leasta sufficient number to secure adequate freeing of the. sheet when thegrippers open. As seen, the thrust of the spring 23 insures thethrow-out of the releaser-ball 22 immediately on the raising of thegripper-beak. With the paper sheet thus unripped and also thrust loosefrom the cylinder,

further delivery mechanism, whose detail is immaterial here, carries theprinted sheet to the delivery table.

This application is a continuation-in-part of my application Serial No.717,028, filed March 23, 1934.

Other modes of applying the principle of the invention may be employed,change being made as regards the details described, provided the meansstated by any of the following claims, or the equivalent of such means,be employed.

I therefore particularly point out and distinctly claim as myinvention:-

1. In printing press cylinder mechanism, a cylinder, grippers carriedthereby, paper-stops movable within the peripheral boundary of saidcylinder, and clearance-grooves in that portion of the periphery of saidcylinder where said stops enter.

2. In printing press cylinder mechanism, a cylinder having alongitudinally cut-out section, gripper mechanism in such cut-outsection, a cover plate for the cut-out, paper-stops movable within theperipheral boundary of said cylinder, and clearance-grooves in saidcover plate adjacent said stops.

3. In printing press cylinder mechanism, a heavy metal cylinder shellhaving a longitudinally cut-out section, gripper mechanism and weightingmeans in such cut-out section, and a light metal cover plate for thecut-out.

4. In printing press cylinder mechanism, a heavy metal cylinder shellhaving a longitudinally cut-out section, gripper mechanism and Weightingmeans in such cut-out section, a light metal cover-plate for thecut-out, and clearancegrooves in said cover plate adjacent said stops.

5. In printing press cylinder mechanism, a cylinder, a gripper forholding a paper sheet to the cylinder, a releaser .reciprocable in thecylinder under said gripper, said releaser having a surface movable withthe sheet to prevent drag on the same, and a spring normally pushingsaid releaser outwardly.

6. In printing press cylinder mechanism, a cylinder, a gripper forholding a paper sheet to the cylinder, a bore in said cylinder under thegripper, and a resiliently protrudable freely rotatable ball in suchbore.

7. In printing press cylinder mechanism, a cylinder, a rock shaftmounted in said cylinder, a gripper carried by said rock shaft forholding a paper sheet to the cylinder, and a front-edge paper gauge onsaid rock shaft alongside said gripper movable with said gripper.

8. In printing press cylinder mechanism, a cylinder, a rock shaftmounted in said cylinder, a gripper carried by said rock shaft forholding a paper sheet to the cylinder, a front-edge paper gauge on saidrock shaft alongside said gripper movable with said gripper, and setscrew means for regulably securing said gripper and said gauge to saidrock shaft.

9. In printing press cylinder mechanism, a cylinder having alongitudinal cut-out section, gripper mechanism in said cut-out section,a rock shaft carrying said gripper mechanism, a paperstop cooperatingwith said cylinder, means for reciprocating said stop toward and awayfrom said cylinder on each revolution thereof, and a front-edge papergauge on said rock shaft.

10. In printing press cylinder mechanism, a cylinder having alongitudinal cut-out section, gripper mechanism in said cut-out section,a rock shaft carrying said gripper mechanism, a cover shaft carryingsaid gripper mechanism, a paperstop cooperating with said cylinder,means for reciprocating said stop toward and away from said cylinder oneach revolution thereof, and a front-edge paper gauge regulably securedon said 5 rock shaft.

JOSEPH F. JIROUSEK.

